When using stm32l4r9vgt chip in cubemx, ltdc RGB interface cannot be selected？

[zhuij.1]

cubeMX version:6.2.1, STM32L4R9ZIT can select RGB interface,but STM32L4RVGT cann't

[zhuij.1]

[MM..1 · Accepted solution]

Maybe because not all RGB pins is accesibble on LQFP100 package